edhseer Commander synergy, explained
Instant
Mana cost: {5}{U}{U}
Affinity for artifacts
Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.
on-cast —
on-cast —
Causes: counter a spell, exile a spell, a spell leaves the battlefield.
Cares about: nothing.
anything is exiled — 2,497 cards in the game can cause this (Assert Authority is one).
an instant is cast — 3,931 cards in the game can cause this (Assert Authority is one).
When Assert Authority is cast:
427 other cards care about it too. These are the ones with the most connections.
anything is cast — 31,128 cards in the game can cause this (Assert Authority is one).
When Assert Authority is cast:
5 other cards care about it too. These are the ones with the most connections.